- fix external imagick issues when rotation was required
- fix: derivative were generated continuosly until a first save performed in the admin screen
- added sharpen param in the new config screen
- increased the sharpen range (10% is less than before)
git-svn-id: http://piwigo.org/svn/trunk@14649 68402e56-0260-453c-a942-63ccdbb3a9ee